Formula Analysis for Dry Skin (Age 40)

Thank you for providing your formula. Based on the ingredients and your experience with a burning sensation, here is an analysis:

Potential Causes of Burning Sensation:

The burning sensation you feel upon application is a common reaction to certain active ingredients, especially in combination and on dry or sensitive skin. The ingredients in your formula most likely contributing to this sensation, as also indicated in the previous replies, include:

• Activated Resorcinol (4-Butylresorcinol): A potent whitening agent known for potential irritation.
• Vitamin B3 (Niacinamide): Can cause temporary flushing (redness and warmth/tingling), particularly depending on the concentration and the grade of Niacinamide used (specifically, the level of residual nicotinic acid).
• Tranexamic Acid: A whitening ingredient that can sometimes cause mild irritation.
• Willow Bark Extract: Contains natural salicylates which can cause a sensation and exfoliation.
• L-Carnitine: Can sometimes induce a warming or tingling feeling.
• Reservoir-Tech: This penetration enhancer might increase the delivery and thus the sensation of other active ingredients.

What to Do:

As advised previously, you need to distinguish between a temporary, tolerable sensation and actual irritation or an allergic reaction:

• If the burning is mild, temporary tingling or warmth that subsides quickly without leaving redness, itching, or a rash, it might be a tolerable reaction for your skin. Some people continue using products that cause this mild, temporary sensation.
• If the burning is severe, persistent, or accompanied by significant redness, itching, swelling, or a rash, this indicates irritation or an allergic reaction. In this case, you should stop using the product immediately and wash it off.

Your skin type is dry, and at age 40, skin can be more prone to dryness and sensitivity. Dry skin often has a compromised barrier, making it more susceptible to irritation from potent actives. Your formula contains a high concentration and variety of strong whitening and anti-aging actives. While it also includes excellent moisturizers (Jojoba Oil, Shea Butter, Panthenol, Moist 72, Algae Extracts), the combination of stimulating ingredients might be too much for your skin barrier.

To identify the specific culprit ingredient causing the reaction, the most reliable method is to test each ingredient individually in a simple base, as suggested by the staff. However, this is a time-consuming process.

Consider reducing the frequency of use or the concentration of the potentially irritating ingredients if you wish to continue using a modified version of the formula. However, modifying percentages requires careful formulation knowledge.

In conclusion, pay close attention to your skin's reaction. Mild, temporary sensation might be acceptable, but any signs of significant irritation or allergy mean you should discontinue use.